On Thu, Jun 20, 2013 at 8:08 AM, Mark Knecht [off-list ref] wrote:
<SNIP>

A couple of follow-up questions if anyone has info & time to answer.
My kernel is 3.8.13-gentoo. I'm using mdadm-3.1.4.

I'm currently doing the recovery step on the 5th of 5 drives so the
next step is the one that will grow the RAID:

mdadm --grow /dev/md0 --size=max

1) With regards to growing the array, a long time ago I remember
growing a RAID and getting burned by a bug that didn't like the ending
sector number. Something about the size of the RAID not being
divisible by chunk size or something like that. At that time I was not
using RAID6. Are there any known problems like that at this time for
RAID6?

2) Out of curiosity, is it the grow command that creates the ext4
filesystem on the new portion of the RAID or is there some step not
shown at the link able where I need to do some file system in this
process? Or possibly the mdadm --add step?

On this part I see it's the resize2fs command further down in the
document. Sorry for the noise.

Still interested in an known bugs in the --grow=max part if there are any.

Thanks,
Mark